Heat pump unit for heating of heating radiators and control method thereof

Abstract

The invention relates to a hot water central heating system adopting heat pumps and a control method of the hot water central heating system, in particular to a heat pump unit for providing hot water for heating of heat radiators and a control method of the heat pump unit. The heat pump unit comprises an air supplying and enthalpy increasing compressor unit, the heat radiators, a high-temperature heat reservoir and a medium-temperature volume device; a refrigerant circulation loop begins from a compressor, passes through a four-way valve, the high-temperature heat reservoir, the medium-temperature volume device, an economizer, a main thermostatic expansion valve, an air supplying expansion valve, a fin type heat exchanger, a four-way valve and a gas-liquid separator in sequence and then returns to the compressor; a control device achieves variable-temperature heating water temperature control by controlling a refrigerating system action flow and a hot water system action flow of the heat pump unit. High-temperature hot water can be obtained by single-stage compression and ordinary environment-friendly type refrigerants; the function that energy is stored when a large amount of heat energy is not needed in a room is achieved while the requirement for changes of high and low heating loads is met, and the function of peak clipping and valley filling is achieved.

Description

technical field [0001] The invention relates to a hot water central heating system using a heat pump and a control method thereof, in particular to a heat pump unit for providing hot water for radiator heating and a control method for the heat pump unit. Background technique [0002] The decline of air quality in northern my country, frequent occurrence of smog, high heating costs and many other comprehensive factors have made the capital Beijing, Tianjin, Hebei and other places make up their minds to vigorously promote the "coal to electricity" policy and spend tens of billions of dollars on traditional small coal stoves for heating. Implementation of power supporting transformation projects. Heating in the north is mostly based on radiators, and the use of heat pumps to provide heating for radiators is an important technical solution for coal-to-electricity conversion. Chinese invention patent "heat pump hot water heating device" (Chinese invention patent number: ZL0312326...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a heat pump unit for radiator heating, which can solve the technical problem of different hot water temperature requirements for radiator heating at different room temperature conditions by only using single-stage compression and ordinary environmentally friendly refrigerants , which can not only meet the needs of rapid temperature rise when the indoor temperature is low, but also reduce the water temperature to keep the room temperature constant when the indoor temperature is close to the room temperature set value, so as to achieve the purpose of energy saving and consumption reduction

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